When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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Parents receive 1 out of every 5 Valentines.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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A man's beard grows fastest when he anticipates sex.
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